Electric mixer



May 5, 1931- c. F. WARRICKa 1,803,446

ELECTRIC MIXER Filed Deo. l0, 1928 INVENTOR ATTORNEYS Patented May 1931 l Y i y 1yrUNITED STATES PATENT OFFICE y i CHARLES r. wannicx, or DETROIT, MICHIGAN i A j 'Y ELECTRIC MIXER Y V I Application 111ml December 10, 1928. ySeriale. 324,991).`

The invention relates to mixing apparatus Wardly from the base -on which is slidably.r and more particularly to an electric device mounted a supporting member 14. The rodl adapted for -domestic use. v 13, as shown,is square( in cross section and Theobject of the invention is tol provide engages an opening of similar dimensions 5 an electric mixer capable of eliminating the,l in the supporting member 14. This member 55 manual operations in connection with the has ia laterall extending portion l5 extendpreparation of foods and drinks where miX- ing over the ase 10 andterminating in the ing, beatingor' stirring is necessary. To this arms 16, 17, 18 and 19, all arranged in a comend I have pi'ojvided the device hereinafter mon vertical plane.l The bracket also has the 10 more fully described having many novel feaoppositely extending gripping portion 520 v60 tures" of construction, amongv which are the scalloped on the under side thereof, forming following: i three curved finger grips 21.y `22 is an elec First, the deviceis provided with an electric motor having a motor casing 23 which, tric mbtorpowerful enough to do the mixing as shown, is of rectangular shape. T he moor.jstir`r}ing of heavyrbatters for cakes, muffins, tor is mounted on the supporting member 14 c5 wales etc. 1 in such a manner as to provide a resilient i Secondfthe motorismounted in a novel yieldable connection capable of absorbing manner capable, of 'absorbing the vibration. vibration dueto the .rotation of the motor The'mou'ting is also designed to prevent and capable also of permitting lateral de 2o bendin of the motor shaft in case of aciection of the entireymotor under stresses. 70

` "cidenta lateral pressureV onthe impeller. acting transversely to the axis of the motor. A thirdadvantageis due to the particulary While various` constructions may Lbe `,emconstruction employed for adjustably mountployed for mounting the motor on the supingthe motor 'on the vertical column. g porting member,-the preferred construction A fourth advantagelies in the construeis as fo1lows: Y

,.tion ofthe iin'peller which is 'pitched like the The upper and lower arms 16` and 19,v reblades of a ships propeller, thus forming a spectively, have apertures l24a. therethrough vortex and causing a circulation of the maand enlarged recesses 25 in the face adjacent terial to be mixeddownward through the imthe column 13. A coil spring 26 engages each 30 peller 'and upward along the sides of the conrecess 25 and projects outwardly beyond the im tainer. This insures a complete and uniform arm where vit engages the head 27 t of a in amixture. Y Y chine screw 28. The screw extends through Further advantages'will be more apparent aperture 24 and threadedly engages the mofrom the detailed description hereinafter tor casing 23. In the preferred construction given and from inspection of theaccompanythe spring 26 is conical inshape, the large a5 ing drawings, whereinv end belng of a size to fill the recess 25 and Figurel is an elevation of the apparatus; the small end being of a size to engage the Figure 2 is a section taken on the line 2-2 shank of the machine screw 28. The side of Figure 1; arms 17 and 18 are each provided with rc# 40 Figure 3 is a section taken on the line 3 3 cesses 29 in the faces adjacent the motor cas` 90 of Figure 2; v 'ing in whichrare arranged similar conical Figure 4 's an end view of the impeller; springs 30, the small ends of which are Figure `5'is a plan view of the impeller; adapted to bear directly against the inner Figure 6 is a top plan view of Figure 1. face 31 of the motor casing. The springs 30 i5 Referring now to the construction as illusthus serve to maintain the motorA casing in 95 trated in the drawings, the device comprises spaced relation tothe arms 17 and 18 but a base 10 having an aperture 11 in the same do not support the Weight of the motor. formed by the beveled side walls 12 and servlVith the construction as described, the moing for thek mounting of a dish or other tor is supported by the machine screws 28 in receptacle. 13 is a vertical rod extending upsuch a manner that a universal movement of 100 the same with respect to the supporting member can be obtained.

32 is the shaft of the motor which extends vertically and projects downwardly below the motor casing 23. Secured to the shaft 32 is an impeller 33 which consists of two blades 34 and 35, each of which is inclined with respect to the horizontal plane. This arrangement provides fora vertical circulation of the material which is beine mixed. The blades, as shown, also have the sharp edges 37 formed by the inclined sides 38. For securing the impeller to the motor shaft there is provided an impeller shaft 39 having at its upper end a chuck 40 frictionally secured to the shaft 32 by the clamping col` lar 41, and prevented from rotation on the shaft by key.

My improved mixer is provided with means for conveniently adjusting the height of the impeller and for raising or lowering the motor with respect to the receptacle in which the mixing takes place. The preferred construction includes a friction clamp which, as shown, comprisesa clamping plate 42 having a rectangular aperture 43 therein of slightly larger width than the rod 13. The plate has a bifurcated end, the furcations 44 of which are return bent, forming hinges 45 and engaging the axially aligne pins 46 on the supporting member 14. A spring 47 interposed between the plate 42 and supporting member 14 serves to maintain said plate in frictional contact with the rod 13, thus holding the entire mechanism in any desired vertical position. A set screw 48 extends through an aperture 49 in the plate-and is secured to the supporting member 14, the head of the set screw forniing a stop for limiting the upward move ment of the plate when the supporting member is removed from the rod 13. The outer end 50 of the locking plate is arranged above the gripping portion 20 so that it is in a convenient position to be actuated by the thumb when three fingers of the hand are engaged in the finger grips 21. The construction as lto described 1s convenient for quick raising and lowering of the motor.

The electric motor is connected to the electric supply by means of a flexible cord 51 and is preferably controlled by a switch 52 on the outside of the motor casing.

The construction as above described is adapted not only for the mixing of drinks for which very little power is required, but is also adapted for relatively heavy work such as the mixing of batters where considerably more power is necessary. The apparatus constructed in the manner described above'is particularly adapted for use as a domestic implement and is designed for convenient use with mixing bowls and other utensils in common use. The base 10 is preferably provided with a rubber mat apertured to correspond with the base and interposed between the base and the mixing bowl.

While I have indicated one embodiment of the invention, it is to be understood that other modifications may be developed coming'within the purview of the invention, and the specification and drawings are therefore considered only as illustrative of the invention.

What I claim as my invention is:

l. A mixing device comprising a standard, a laterally projecting su porting member, a motor having a vertical) axis, a plurality of supporting arms on said supporting member arranged to one side of the axis of said motor, and spring connections between the casing of said motor and said supporting arms.

2. A mixing device comprising a. standard, a laterally projecting support, a motor hav ing a casing, a series of arms projecting laterally of said support and arranged to one side of the axis of said motor and a laterally projecting spring between each of said arms and said casing.

3. A mixing device com rising a base, a column extending upwar ly therefrom, a supporting member projecting laterally of said column, a series of arms arranged in a vertical plane, a rectangular motor casing and a series of spring supporting members between said arms and said motor casing.

4. In a mixing device, the combination of a motor casing having a substantially vertical axis, a series of arms adjacent said motor casing, supporting studs projecting from said motor casing through one or more of said supports, a spring between said stud and one of said arms and springs between others of said arms and said motor casing.

5. In a mixing device, the combination with a standard having a series of arms, a motor casing, a pair of headed studs extending through two of said arms and secured to said motor casing, coil springs between said arms and said heads and other coil springs between the other arms and said motor casing.

6. In a mixing device, the combination vwith a spider member having a series of arms arranged in substantially the same plane, two of said arms having recesses on one side of said plane and two others of said arms having recesses on the opposite side of said plane, a motor casing, springs engaging the first mentioned recesses, studs engaglng said springs and passing through said arms and being secured to said motor casing and springs engaging the other recesses aforesaid and directly engaging said motor casing.

7. A mixing device comprising a standard, a column extending upwardly therefrom, a supporting member slidable on said column, an electric motor carried by said supporting member and a 4.plate hingedly connected to said supporting member and apcrtured to receive said column and springs between said plate and said supporting member for frictionally holding,r the former to said column.

8. In a mixing device, a motor casing having a substantially vertical axis, a supporting member adjacent said motor casing, means for supporting said motor casing from w said supportingr member, and means betvveen said motor casing and said supportlng member for urging saidmotor casing away from said supporting member. Y

9. ln a mixing device, a motor casing hav- 5 ing a substantially vertical axis ,a series of arms adjacent said motor caslng and arranged to one side of the axis thereof, connections between certain of said arms and .said motor casingr for snpliorting said motor 20 easing vfrom said supporting member, springs associated with said connections for urglng said motor casing' toward said supporting arms. and additional springs between other of said arms and said motor casing for urg- 25 ing said motor casing away from said supporting arms.

ln testimonyT whereof I affix mv signature.

CHARLES F. WRRICK. 

